Carton



W. H. INMAN May 2, 1944.

CARTON 3 Sheets-Shet 1- Filed Aug. 20, 1942 INVENTOR.

CARTON Filed Aug. 20, 1942 5 Sheets-Sheet 3 INVENTOR.

Patented May 2, 1944 CARTON William H. lnman, Newark, N. Y., minor to Bloomer Bros. Company, Newark, N. Y., a corporatlon of New York Application August 20, 1942, Serial No. 455,402;

14 Claims.

This invention relates to cartons made of cardboard or other foldable material cut, scored and folded to form a container for articles of food materials, fragile articles or the like, one object 1 being to provide a carton of the above character having multiple wall thicknesses and improved strength and insulating qualities.

Another object is the provision of such a car ton made from a single blank of material cut, scored and folded .to'form walls of multiple plies of the blank material arranged toaiford more complete sealing of the carton against surrounding atmosphere.

A further object is to provide a carton of the character described in advantageous combination with one or more separately formed sheets of special insulating materials for completing the sealing of the carton and the protection of food materials or other contents from light rays, gases, moisture and other external conditions.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Fig. 1 is a plan view of a blank cut and scored for folding to make the carton;

Fig. 2 is a view showing the left hand half of the blank reversely folded to overlap the right hand half;

Fig. 3 is a fragmentary view showing the left hand section of Fig. 2 folded toward the right;

Fig. 4 is a similar 'view with the right hand section partially shown in Fig. 3 folded toward the left to complete the carton in collapsed condition;

Fig. 5 is a sectional view on the line 50-50 in Fig. 2;

Fig. 6 is a sectional view on the line 60-61! in Fig. 3;

Fig. '7 is a sectional view on the line 'Ia'la in Fig. 4;

erected with the closure flaps at one end unfolded;

Fig. 9 is a similar view, partly broken away, showing the end closure flaps partially folded;

Fig. 10 shows a transverse section through the carton between its ends; V

Fig. 11 is a sectional view, partly broken away, on the line IIa-I la in Fig. 13;

Fig. 12 is a similar view on the line I2a.-I2a in Fig. 13;

Fig. 13 is a perspective view, partly broken away, showing the end closure flapscompletely folded;

Fig. 14 is a. plan view of'the cardboard blank shown in Fig. 1, but having associated therewith two separately formed liner sheets;

Fig. 151s a view similar to Fig. '1 but includin the liners shown in-Fig. 14;

Fig. 16 is a perspective view similar to Fig. 8 but including the said liners, and

Fig. 17 is asimilar view showing each of the liners, and all of the end flaps but one, folded down to close the carton.

In the preferred embodiment of theinvention, herein disclosed by way of illustration, the carton is formed principally from a one-piece blank of cardboard, cut and scored for folding and comprising a series of side wall sections, I to 8, inclusive, arranged in contiguous side by side relation, as shown in Fig. 1. Sections 1 to 4, inclusive, which form the set of inner side walls, as hereafter described, are of slightly less width than the sections 8 to 5, respectively, which form the set of outer side walls. Section I is extended to provide an attaching strip 9 separated by a scored folding line I0. Section 8 is extended to provide an attaching strip II separated by a scored folding line I2. 7

Certain of side wall sections I to 8 carryextensions forming flaps for closing the ends of the carton, which latter are the same, so that a description of the flaps at one end will suflice for both. Section I carries a flap I3, preferably of the same size as the interior cross section of the carton, separated by a scored folding line I4 and being otherwise unattached. Section 2-carries an extension I5, also preferably of the same size as the interior of the carton, separated fromthe blank by a scored folding line I6, but being otherwise unattached- Flap I5 carries a securmg tab Il separated from it by a scored folding line I8. Section 3 carries a flap I9 similar to the Fig.8 is a perspective view showing the carton I flap I3. Section 4 carries a'flap 20 similar to the flap IS, with a tab extension 2 I similar to the tab Il, except thatthe tab I1 is preferably tapered at its sides, as indicated at 22.

At the opposite end of the blank, section 8 carries a closure flap extension at each end, as

at '23, separated by a scored folding line 24. Flap 23 has at its outer end a tab 25 separated by a scored folding line 26. On each side of flap 23' is a tab, as 21, separated'by a scored folding line 28 and being otherwise unattached.

The side walls I to 8 are-marked off or separated from each other by scored folding lines, as

shown at 23,-about which they are folded at right anglesto one another to form the sides of the.

' half, as shown in Fig. 1, about the central score line 30, so that it .overlaps and lies against the -right hand half of theblank, as shown in Fig. 2.

Section I is then folded to the left about the intermediate score line to' lie against section 2, as shown in Figs. 3 and 6, and sections 4 and 5 together arethen folded toward the right over section 3 and over the securing strip 9 of section I, as also shown in Figs. sand 6. Section 8 is then folded-toward the .'left to overlie section I, as shown in Figs. 4 and 7, with its securing strip ll overlying section 5. Securing strips 9 and II are preferably coated with adhesive so that when so folded, they are adhesively securedto sections "4 and 5 respectively. In the completed form shown in Figs.-4 and '7, the carton is collapsed in a compact, fiat condition conveniently adapted for storage, packaging, or transportation in quantities.

In erecting thecarton from the collapsed condition of Figsniand 7, the side walls are swung into right angular; relation with one another in the tubular form shown in Figs. 8 to 13, inclusive,

The endflaps are the same, in the present instance, at each'end of the carton, so that a description ofrthose atone-end will applyto both. Referring to Fig.8, it will be seen that the fiaps l3 and I9 extend-at opposite sides of the carton and these flaps are preferably first folded down, in overlapping relation with each other, to close the carton,'as indicated in Fig. 9. Thereafter, the opposite flaps l5 and 20 are folded down over thefiaps J3 and I9 and their end tabs, I1 and 2!, are folded and tucked in between the separate inner and outer side walls, as indicated in Fig.9, thereby securing these fiaps in closed condition. To still more tightly seal the end closure, fiap 23 is then folded down and its tabs 25 and 21 are likewise securely tucked in between the separate double side walls, all as shown in Figs. 11 to 13, inclusive. The closed ends of the carton may then be dipped in paraflin or other known or suitable liquid for coating and further sealing the same.

It will be apparent from the above description that the blank is shaped to be readily died out of the sheet material and cut and scored for folding by known means and methods. The substantial scoring of the central fold line 30, as by means of the through cuts 3|, insures precise folding along this line and accurate aline ment of the folded halves of the blank with each other, as shown in Fig. 2, which is of particular importance in the case of relatively long folded portions of material, as in the present instance.

Although such deep scoring at the fold line 30 mightrotherwise tend to leakage, it will be noted that this fold line is substantially overlapped and strengthened and sealed by the securing strips 9 and II between which it is inserted and adhesively secured,'so as to counteract any such tendency to leakage.

The construction has the further advantage that the inner and outer walls of each side of the carton are separate from each other throughout substantially the whole width of each side adjacent the ends thereof and preferably from end to end, so that the two walls of each side may move slightly relatively to each other and may be spaced for the insertion and securing therebetween of the tabs of the end flaps. Moreover, with the inner side walls of slightlyless width than the outer side walls, this construction enables the blank to be folded and adhesively secured, as shown in Figs. 4 and '7, with entire facility, the double walls being free to easily fold and slide slightly on each other, without distorting or otherwise interfering with the proper shape, accurate folding and desired relation of the parts, the inner and outer sets of side walls being connected with each other only by a single thickness of the blank material extending integrally from one of said sets to the other at the fold line in one of the corners between adjacent side walls.

The double wall construction affords the further advantage of an ample number of end closure flaps which may be located on both sets of side walls. Thus, in the present instance, fiaps l3, l5, l9 and 20 are located on the inner set of side walls, while fiap 23 and its tabs 25 and 21 are located on the outer set, supplying in this case five thicknesses of material closin the ends of the carton and secured in place by five tabs tucked into the spaces between the side walls. A further meritorious feature lies in the adaptability of the cardboard structure described above to combination with separately formed walls of one or more special insulating materials. Such additional insulating walls are preferably provided by one or more separately formed sheets of insulating material associated with the card board blank described above. Thus Fig. 14 shows the said cardboard blank having applied thereto a separately formed sheet of foldable material 32 of substantially rectangular shape, which is applied in the present instance over the side walls 5, 6, I and 8 so as to be interposed and enclosed between the two halves of the blank when'folded as above described. The end of blank 32 overlying section 8 of the main blank is preferably extended as at 33 to partially overlap securing strip I I. After the blank is folded as above described to form the carton, the insulating liner 32 is folded with it as shown in Fig. 15, being held between and protected by the inner and outer side walls, Blank 32 has ends which extend as far as the ends of the closure flaps, as shown in Fig. 16, and these extended end portions of blank 32 are folded inwardly from each side in overlapping folds 34, to further close the ends of the carton and completely cover the contents, as indicated in Fig. 17, iizihesezafolds being finally covered by the outer end In addition to the liner interposed between the double walls of the carton, as above described, an additional liner of insulating material may be employed and arranged to cover the inner surfaces of the inner walls. Such a liner is shown, for example, at 35, Fig. 14, of rectangular shape,

and preferably secured to and mainly overlying sections I, 2, 3 and 4 on the sides thereof which become the inner surfaces of the carton. Liner 35, at one of its ends, 36, is preferably spaced inwardly from the edge of section 4 of the main blank, so as not to interfere with the adhesive attachment of section 4 to strip 9 of section I. The other edge 31 of the liner. however, is preferably extended somewhat beyond the securing strip 9 of section I of the main blank, so as to overlie edge 33 for adhesive attachment thereto.

. Liner 35 extends at its ends substantially as far as the end closure flaps, and these end extensions of the liner provide material which is folded across the ends of the carton under the end flaps I 3 and I9, so as to completely enclose the contents of the carton.

The above described liners may be made of any material suitable for accomplishing the types of insulation desired. Thus, I prefer to make the intermediate liner 32, which is protected between the inner and outer walls, of light-insulating, substantially opaque material for protecting the contents of the carton when employed to contain materials, such as certain foods, which are sensitive to injury by light. A material which I have found satisfactory for the purpose, for example, is the substantially black paper which is commercially available and commonly employed for wrapping sensitive photographic plates and film, to protect the same from light. This intermediate liner 32 may have water resistant qualities, but I preferably employ for that purpose the inner liner 35 which is in contact with the contents'of the carton. Liner 35, for example, may be made of Cellophane, or any known and suitable moisture vapor resistant material.

The above described construction of the main cardboard portion of the carton, with its separate inner and outer walls, is peculiarly adapted and advantageous for use with an intermediate liner such as described, since the spacing of the inner and outer walls may be readily made suflicient to accommodate the inserted thickness of the liner.-

The cardboard blank is made of a weight and quality of cardboard, as well understood in the art, suited to the thickness and purposes desired, but I preferably employ cardboard insulated on both sides by cold water waxing, using, preferably, a mixture of equal proportions of microcrystal line wax and regular paraflin wax, as well understood in, the art. In the case of any of the above modifications, I may further complete the sealing of the closed carton by dipping each end and adjacent side wall portions in molten wax,

such as described above which, upon cooling, forms a continuous coating which seals the joints between the enclosure flaps and side walls, as indicated at 38 in Figs. 11 to 13 inclusive.

' The described construction afiords, in efi'ect, a pair of complete, inner and outer cartons, the inner and outer surfaces of each carton bein preferably waxed as described, so that the main blank alone provides the protection of at least four waxed surfaces which may be increased, where desired, by the addition of one or two liners of insulating material especially adapted to the particular contents of the material, or the external conditions to which the carton may be subjected. The coating of the carton ends, after closing, adds still further protection, and these various provisions may be employed to supply a carton which is highly resistant to light rays, temperature variations, moisture vapor, gases, insects and the like. These qualities are particularly useful in the packaging, shipment and 75 preservation of foods such, for example, s "dried meat, dehydrated vegetables and the like, in which a low moisture content must be maintained to prevent deterioration in flavor, taste and appearance, as well as freedom from bacteria.

It will thus be seen that the invention accomplishes its objects, and while. I have herein described the details of one preferred embodiment of the invention, it is to be understood that such than a limiting sense, as it is contemplated that *various changes in the construction and arrangement of the parts will readily occur to those skilled in the art within the spirit of the invention as defined in the appended claims.

I claim:

1. A carton made of foldable waxed fibrous sheet material and comprising a blank reversely folded upon itself adjacent its center and having said folded center adhesively secured and sealed to its opposite ends to provide inner and outer sets of carton side walls, the inner and outer walls of each carton side being separate from each other throughout substantially the whole width of said side adjacent the ends thereof, extensions on the walls of said sides forming end closure flaps, tabs on said flaps inserted and held between said separate inner and outer walls of v I said carton sides and moisture resistant material adhesively sealing said closure flaps to said side walls; 2. A carton made of foldable waxed fibrous sheet material and comprising a blank reversely folded upon itself adjacent its center to provide inner and outer sets of carton side walls, said fold being located at a corner fold-between adjacent carton sides and being there inserted and adhesively secured and sealed between the overlapping opposite ends of said blank, extensions on the walls of certain of said sides forming end closure flaps, tabs on certain of said flaps inserted and held between the inner and outer walls of said carton sides and moisture resistant means for sealing said end closure flaps and side walls.

3. A carton made of foldable waxed fibrous sheet material and comprising a blank reversely folded upon itself adjacent its center to form inner and outer sets of carton side walls, said sets being connected with each other only by a' single thickness of said material extending integrally from one of said sets to the other at a corner fold between adjacent carton sides and by adhesive attachment of said folded center to the opposite ends of said blank, extensions on the walls of said sets forming end closure flaps for the carton, tabs on said flaps inserted and held between said inner andouter walls of said carton sides and moisture resistant means for sealing said end closure flaps and side walls.

4. A carton made. of foldable waxed fibrous sheet material and comprising a blank reversely folded upon itself adjacent its center to provide overlapping sets of inner and outer carton side walls, said material being substantially scored along said fold to contro1 the folding of said sets in accurate alinement with each other and said fold being located at a corner fold between adjacent carton sides and. there inserted and adhesively secured between the overlapping opposite ends of said blank, the inner walls of said carton sides being of slightly less width than the corresponding outer walls, respectively, and said inner and outer'walls of said carton sides being separate from each other, extensions on the description is intended in an illustrative, rather walls of certain of said sides forming end closure flaps, tabs on certain of said flaps inserted and held between the inner and outer walls of certain of said carton sides and moisture resistant mav terial adhesively sealing said closure flaps to said side walls.

5. A carton made of foldable waxed fibrous.

sheet material and comprising a blank reversely folded upon itself adjacent its center to form inner and outer sets of carton sidewalls, said sets being connected with each other only. by a single thickness of said material extending inprising a blank reversely folded upon itself adjacent its center to provide inner and outer sets of carton side walls, and having said folded center adhesively sealed to its opposite ends, the inner and outer walls of each carton side being separate from each 'other, a liner of insulating material enclosed between the inner and outer walls of each carton side, extensions on the walls of said sidesforming end closure flaps, tabs on I jacent its center to provide inner and outer sets ing outer walls, respectively, and said inner and tensions on the walls of said sides forming end closure flaps, tabs on certain of .said flaps in- .serted and held between-said separate inner and .outer walls of certain of said carton sides-and moistureresistant material .adhesively securing said closure flaps to said side walls.

6. A carton made of foldable waxed fibrous sheet material and'comprising a one-piece blank reversely folded upon itself adjacent its center to provide overlapping inner and outer sets of carton side walls, the walls at the ends of said blank opposite said fold being extended to form outer walls being separate fromeach other, ex-

of carton side walls and having said folded center adhesively secured and sealed to its opposite ends, the inner and outer walls of each carton side being separate from each other, a light-insulating liner of substantially opaque material attaching strips, said fold being located at a corner fold between adjacent carton sides and being there inserted and adhesively secured vbetween said strips, the inner walls of said carton sides being of slightly less width than and separate from the corresponding outer walls, respectively, extensions on the walls of said sides forming end closure flaps, tabs on said flaps inserted and heldbetween the inner and outer walls of said carton sides and moisture resistant means for sealing said end closure flaps and sidewalls.

'7. A sealed carton for containing and preserving food substances, said carton being made of foldable waxed fibrous sheet material and comprising a blank reversely folded upon itself adjacent its center and havingsaid folded center adhesively secured and sealed to its opposite ends to provide inner'and outer sets of carton side walls, the inner and outer walls of each carton side being separate from each other, extensions 1 jacent its center to provide inner and outer sets of carton side walls, said fold being located at a corner fold between adjacent carton sides and being there inserted and adhesively secured betweenv the overlapping opposite ends of said blank, extensions on the walls of certain of said sides forming end closure flaps, means for securing said flaps in closed position, and a coating of water resistant material sealing the joints between said flaps and'said carton sides.

9. A sealed carton for containing and preserving food substances, said carton being made of ifoldable waxed fibrous sheet material and comenclosed between the inner and outer walls of each carton side, extensions on the walls of said sides forming end closure flaps, tabs on said flaps for engagement with said walls and moisture resistant means for sealing said end closure flaps and side walls.

1].. A sealed carton for containing and preserving food substances, said carton being made of foldable moisture resistant sheet material and comprising a one-piece blank reversely folded upon itself adjacent its center to provide alined overlapping inner and outer sets of carton side walls, the walls atthe ends of said blanks opposite said fold having extensions forming attaching strips, said fold being located at a corner fold between adjacent carton sides and being there inserted and adhesively'secured between said strips, 9. liner'of foldable insulating material interposed and supported between said sets of side walls and having extensions folded over the ends of said carton, extensions on the walls of said sides forming end closure flaps, tabs on said flaps inserted and held between said inner and outer side walls of said carton and moisture resistantmeans for sealing said end closure flaps and side walls.

12. A sealed carton for-containing and preserving food substances, said carton being made 01' foldable moisture resistant sheet material and comprising a blank reversely folded upon itself adjacent its center to provide inner and outer sets of carton side walls and having said folded center adhesively secured to its opposite ends.

- its center to provide inner and outer sets of carton side walls, the walls at the ends of said blank opposite said fold having extensions forming attaching strips, said fold being located at a corner fold between adjacent carton sides, and being there inserted and adhesively secured between said strips, a liner of separately formed, foldable,

substantially opaque' material interposed and supported between said sets of side walls, and having extensions folded over the ends of said carton, extensions on the carton side walls forming end closure flaps, tabs for securing the flaps in closed position, and a coating of moisture resistant material covering the outer surfaces of the ends of said carton and sealing the joints between said flaps and side walls.

14. A sealed carton for containing and preserving food substances, said carton being made of foldable waxed fibrous sheet material and comprising a one-piece blank reversely folded upon itself adjacent its center to provide alined overlapping inner and outer sets of carton side walls, the walls at the ends of said blank opposite said fold having extensions forming attaching strips, said fold being located at a corner fold between adjacent carton sides and being there inserted and adhesively secured between said strips, a liner of foldable insulating material interposed and supported between said sets of side walls and having extensions folded over the ends of said 

